The study revealed that ordinary acceler- ators for portlandcement also improves early strength of Belite cement remarkably, butone serious defect exists Which lead to a high strength reduction atthe age of 28 days. T...The study revealed that ordinary acceler- ators for portlandcement also improves early strength of Belite cement remarkably, butone serious defect exists Which lead to a high strength reduction atthe age of 28 days. The paper analyzes the action mechanism ofordinary accelerators on Belite cement. It shows that theseaccelerators can not accelerate the hydration of β-C_2S directly.展开更多
Belite-rich cement （BRC） can be made at lower temperature, but it has unsatisfactory reactivity. The crystal structure of dicalcium silicate （C2S） was modified by solutionizing some additional irons. By adding bar...Belite-rich cement （BRC） can be made at lower temperature, but it has unsatisfactory reactivity. The crystal structure of dicalcium silicate （C2S） was modified by solutionizing some additional irons. By adding barium sulfate （BaSO4） in the raw meals, the clinkers were easier to be burnt, and the compressive strength of BaSO4-modified BRC was considerably improved. The distortion of the crystal structure of C2S was confirmed by the interplanar distance change and nuclear magnetic resonance （NMR） of ^29Si in C2S. An effective way was found to activate C2S and to broaden the application field of Belite-rich cement.展开更多
文摘The study revealed that ordinary acceler- ators for portlandcement also improves early strength of Belite cement remarkably, butone serious defect exists Which lead to a high strength reduction atthe age of 28 days. The paper analyzes the action mechanism ofordinary accelerators on Belite cement. It shows that theseaccelerators can not accelerate the hydration of β-C_2S directly.
文摘Belite-rich cement （BRC） can be made at lower temperature, but it has unsatisfactory reactivity. The crystal structure of dicalcium silicate （C2S） was modified by solutionizing some additional irons. By adding barium sulfate （BaSO4） in the raw meals, the clinkers were easier to be burnt, and the compressive strength of BaSO4-modified BRC was considerably improved. The distortion of the crystal structure of C2S was confirmed by the interplanar distance change and nuclear magnetic resonance （NMR） of ^29Si in C2S. An effective way was found to activate C2S and to broaden the application field of Belite-rich cement.
